This is a list of all monsters in the Ultraman Max.
| Monster | Description |
|---|---|
| Grangon | An ancient monster with a mineral-like structure. |
| Lagoras | An ancient ice monster, Grangon's natural enemy. |
| Eleking | Alien creature that must survive on electricity |
| Baby Eleking | Offspring to Eleking |
| Regilla | An ancient flying monster. |
| Alien Sran | Alien capable of moving at super-speed. |
| Red King | Monster from Phantom Island, imprisoned there by alien visitors (Pigmon's creators). |
| Salamadon | Monster from Phantom Island, Pigmon's protector. |
| Paragura | Monster from Phantom Island, Pigmon's protector. |
| Pigmon | Creature left in Phantom Island by ancient visitors, actually a 'living' bio-computer. |
| Kesam | Alien that planned on destroying all human life on earth, experienced a change of heart after meeting Mizuki. |
| Bugdalas | Insectoid monster which fed on human life energy. |
| Natsunomeryu | Ancient Japanese Dragon |
| Metashisas | Other-dimensional creature. |
| Antlar | Creature capable of generating powerful magnetic fields, responsible for the destruction of Baraghi centuries ago. |
| Heiren | Monster capable of flying as speeds exceeding Mach 10. |
| Zetton | |
| Alien Zetton | |
| King Joe | |
| If | A being capable of duplicating any force or energy used against it. |
| Tama, Mike, and Kuro | Creatures whose energy fields caused memory loss in living beings. |
| Eraga | Ancient monster. |
| Alien Shama | The Shama aliens originated from the planet of the same name. |
| Alien Tala | |
| Gilfas | |
| Cloudos | An extra-dimensional monster, which floated while sleep, but became super-heavy when awake. |
| Gomora | An Anicent Dinosaur species that went extinct, only one surviving |
| Madeus | |
| Flygler | Marine monster, theorized to be a mutated flying fish. |
| Alien Metron | |
| Neril Alien Kiif | |
| Alien Godley | |
| Yunijin | |
| Alien Pitt | |
| Baby Eleking II | Younger offspring to Eleking |
| Eleking II | |
| Ruganoga | Space monster capable of destroying planets. |
| Geronga | Ancient subterranean monster. |
| Lagoras Evo | An 'Evolved' Ragoras, as a result of absorbing Grangon's molten core. |
| Moetaranga | Alien which used a virus to induce extreme 'burn out syndrome' on humans. |
| Keros | Alien from the same species as Kesam, attempted using Elly to defeat and destroy the UDF. |
| Tiny Baltan | |
| Darkness Baltan | |
| Adam and Eve | Survivors from M32 |
| Hop Hop | Monster protector of 'Adam and Eve' |
| Kepulse | Constellation beast. |
| Automaton | Mechanical bodies fashioned by the people of Deros |
| Satellite Berserk | Robot guardian of the people of Deros |
| Scout Berserk | Robot sent by the Deros civilization to battle Ultraman Max, to gauge his strengths and weaknesses. |
| Giga Berserk | Robot designed to defeat Ultraman Max |